摘要:
A circuit for reorganizing a bit mapped source image into a print image is disclosed. The circuit can be used to simultaneously actuate individually located print elements (36) of a printer. Offset values corresponding to the individual positions of each print element are stored in an offset memory (52). The offset values are each added to a base address to generate an addressing mask for accessing desired bits of a source image (81) stored in a source image memory (80).
摘要:
For both reducing the ligament length and satellite droplet problems associated with producing high velocity ink droplets from an ink jet head printing at relatively high ink jet head-transport speeds, the ink jet head is driven by composite waveform including independent and successive first, second, and third electrical pulses (332,334,336), each having an exponential leading edge and a step-like trailing edge, the pulses having amplitudes, pulse widths (T 1 ,T 3 ,T 5 ), and dead times (T 2 ,T 4 ) between pulses, for causing the ink jet head to eject three successive ink droplets, each of increased velocity (V,, V 2 , V 3 ) relative to the preceding droplet, for causing the droplets to merge in flight to form a single or ultimate droplet (344) having a predetermined velocity (V4).
摘要:
Ink jet apparatus utilizing hot melt ink includes a pressure source (80,89) for repriming the system following non-use and freezing of the ink in the reservoir (61). The repriming operation may be carried out either manually or automatically, as long as permitted by the sensed level of the ink in the reservoir system (Figure 2).
摘要:
An impulse ink jet apparatus comprising a chamber (36) including an inlet (4l) and a plurality of ejection orifices (40). An ink supply is coupled to the inlet (4l) and transducer means (46) is coupled to the chamber (36) for ejecting droplets from each of the plurality of orifices (40) in response to the state of energization of the transducer means (46).
摘要:
An impulse ink jet apparatus (Figure 4) comprising a plurality of side-by-side chambers (32, Figure 5) extending along a line slanted (angle "A") with respect to a direction of scanning. Each of the chambers include a plurality of orifices (24) arranged along a line extending substantially transverse (e.g., vertical) to the scanning direction and means are provided (transducers 44 1 for ejecting a plurality of droplets from the orifices of each chamber
摘要:
Ink jet apparatus for use with hot melt ink has an integrally connected ink jet head and reservoir system, the reservoir system having a sloping flow path (58) between an inlet position and a sump (60) from which ink is drawn to the head, the reservoir being housed in a housing (40) of good heat conductivity material with a heater (51) connected thereto, and further having one or more heat conducting elements (55, 57) positioned between the inlet position and the sump, which elements are constructed to act both as baffles and as heat conducting fins.
摘要:
Hot melt ink is maintained in a solid state. When ink is called for in the reservoir (18) of a scanning imaging head (10), the head is moved to a refill position coupled to the solid state ink, whereupon the ink is melted coupled into the reservoir of the imaging head.
摘要:
In an ink jet printer, pellets of two phase ink in solid form are dispensed from a revolvable cylindrical cartridge (100), whereby a pellet of ink drops from the cartridge into a heated reservoir (10), where the ink pellet melts and is then fed in liquid form to a chamber, for ejection from an orifice (20) as an ink droplet.